[igt-dev] [PATCH i-g-t 3/3] tests/intel/freq: Test throttle basic API infra

[Sundaresan, Sujaritha]

On 12/6/2023 3:08 AM, Rodrigo Vivi wrote:
> For now we don't have a reliable way to force PCODE throttling,
> but let's at least check for some sanity on our exposed API.
>
> Cc: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
>   tests/intel/xe_gt_freq.c | 48 ++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 48 insertions(+)
>
> diff --git a/tests/intel/xe_gt_freq.c b/tests/intel/xe_gt_freq.c
> index 719852530..650c54005 100644
> --- a/tests/intel/xe_gt_freq.c
> +++ b/tests/intel/xe_gt_freq.c
> @@ -68,6 +68,49 @@ static uint32_t get_freq(int fd, int gt_id, const char *freq_name)
>   	return freq;
>   }
>   
> +static uint32_t get_throttle(int fd, int gt_id, const char *throttle_file)
> +{
> +	uint32_t val;
> +	char throttle_attr[40];
> +	int gt_fd;
> +
> +	snprintf(throttle_attr, sizeof(throttle_attr),
> +		 "freq0/throttle/%s", throttle_file);
> +	gt_fd = xe_sysfs_gt_open(fd, gt_id);
> +	igt_assert(gt_fd >= 0);
> +
> +	igt_sysfs_scanf(gt_fd, throttle_attr, "%u", &val);
> +
> +	igt_debug("gt%d/freq0/throttle/%s: %u\n", gt_id, throttle_file, val);
> +
> +	close(gt_fd);
> +	return val;
> +}
> +
> +/**
> + * SUBTEST: throttle_basic_api
> + * Description: Test basic throttle API
> + */
> +
> +static void test_throttle_basic_api(int fd, int gt_id)
> +{
> +	uint32_t status, reasons;
> +
> +	status = get_throttle(fd, gt_id, "status");
> +	reasons = get_throttle(fd, gt_id, "reason_pl1");
> +	reasons |= get_throttle(fd, gt_id, "reason_pl2");
> +        reasons |= get_throttle(fd, gt_id, "reason_pl4");
> +	reasons |= get_throttle(fd, gt_id, "reason_prochot");
> +	reasons |= get_throttle(fd, gt_id, "reason_ratl");
> +	reasons |= get_throttle(fd, gt_id, "reason_thermal");
> +        reasons |= get_throttle(fd, gt_id, "reason_vr_tdc");
> +	reasons |= get_throttle(fd, gt_id, "reason_vr_thermalert");
> +
> +	if (status)
> +		igt_assert(reasons);
> +	else
> +		igt_assert(!reasons);
> +}

Hi Rodrigo,

Some weird alignment issues above ?

Otherwise LGTM.

Reviewed-by: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>

>   
>   /**
>    * SUBTEST: freq_basic_api
> @@ -289,6 +332,11 @@ igt_main
>   		stash_max = get_freq(fd, 0, "max");
>   	}
>   
> +	igt_subtest("throttle_basic_api") {
> +		xe_for_each_gt(fd, gt)
> +			test_throttle_basic_api(fd, gt);
> +	}
> +
>   	igt_subtest("freq_basic_api") {
>   		xe_for_each_gt(fd, gt)
>   			test_freq_basic_api(fd, gt);